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arXiv 1111.5433quant-ph
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开放量子系统通过强耦合到非马尔可夫库的消相干抑制

Decoherence suppression of open quantum systems through a strong coupling to non-Markovian reservoirs

Chan U. Lei, Wei-Min Zhang

摘要:

本文给出了一般开放量子系统,特别是类薛定谔猫态的退相干抑制机制,即通过强耦合到非马尔可夫库。与文献中通常的通过系统与环境解耦来抑制退相干的策略不同,本文利用非马尔可夫库的强反作用来抑制退相干。该机制依赖于非平衡态滞后格林函数的奇点(束缚态)的存在,它完全决定了开放系统的耗散和退相干动力学。作为应用,我们研究了耦合到波导的光子晶体纳米腔的退相干动力学。对光学猫态的退相干进行了强的非马尔可夫抑制。

英文摘要:

In this paper, we provide a mechanism of decoherence suppression for open quantum systems in general, and that for "Schrodinger cat-like" state in particular, through the strong couplings to non-Markovian reservoirs. Different from the usual strategies of suppressing decoherence by decoupling the system from the environment in the literatures, here the decoherence suppression employs the strong back-reaction from non-Markovian reservoirs. The mechanism relies on the existence of the singularities (bound states) of the nonequilibrium retarded Green function which completely determines the dissipation and decoherence dynamics of open systems. As an application, we examine the decoherence dynamics of a photonic crystal nanocavity that is coupled to a waveguide. The strong non-Markovian suppression of decoherence for the optical cat state is attained.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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